The Coupler,directional, cataloged under National Stock Number 5985-01-139-1081, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-139-1081 |
| Primary Part Number | MDC6266-6 |
| Item Name | Coupler,directional |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc |
| Status | ACTIVE |
| Terminal Fitting Controlling Agency | DEPARTMENT OF DEFENSE |
| Usage Design | MAIN LINE AND SECONDARY LINE TERMINAL FITTING |
| Design Type | BIDIRECTIONAL OR UNIDIRECTIONAL |
| Radio Frequency Rating | 2.6 GIGAHERTZ MINIMUM AND 5.2 GIGAHERTZ MAXIMUM |
| Unit Type | COAXIAL LINE OR TRANSMISSION LINE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MDC6266-6 | Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc (USA) |
| Reference | Meaning |
|---|---|
| 4053-6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5985-01-139-1081 is a Coupler,directional, manufactured by Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-139-1081 has 1 manufacturer part number on file: MDC6266-6 (Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc).
1 possible match (shared part number, not a government interchangeability claim): 5133-01-460-2352. Verify interchangeability with system specifications before substitution.
Key specifications for MDC6266-6: Overall Height: 0.375 INCHES NOMINAL IN; Terminal Fitting Controlling Agency: DEPARTMENT OF DEFENSE; Usage Design: MAIN LINE AND SECONDARY LINE TERMINAL FITTING; Design Type: BIDIRECTIONAL OR UNIDIRECTIONAL. 5 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.